Twisting machine

ABSTRACT

The spindles of the twisting machine are mounted on spindle rails which are directly or indirectly mounted on the machine frame by omnidirectally acting damping members such as rubber pads. In addition, a cover can be disposed about the spindle rails and spindle drives to damp noise. Finally, a damping element can be secured about the spindle rail to damp noise.

United States Patent Inventor Appl. No.

Filed Patented Assignee Priority Rudolf Jaeggli Bern, Switzerland May12, 1969 Sept. 14, 1971 Rieter Machine Works, Ltd. Winterthur,Switzerland May 20, 1968 Switzerland TWISTING MACHINE 14 Claims, 6Drawing Figs.

US. Cl

57/136, 248/22 Int. Cl D0lh 1/14, DOlh 7/l0 Field of Search {56]References Cited UNITED STATES PATENTS 2,758,439 8/1956 Bradshaw 57/] X3,054,250 9/1962 Schurr et al. 57/l04 3,063,770 I 1/1962 Hale et al248/22 X 3,312,920 4/1967 Twomey 248/20 X FOREIGN PATENTS 732,491 6/1955Great Britain 57/l 1,013,556 12/1965 Great Britain 57/1 PrimaryExaminer-Stanley N. Gilreath Assistant Examiner-Werner H. SchroederAttorney-Kenyon & Kenyon ABSTRACT: The spindles of the twisting machineare mounted on spindle rails which are directly or indirectly mounted onthe machine frame by omnidirectally acting damping members such asrubber pads. In addition, a cover can be disposed about the spindlerails and spindle drives to damp noise. Finally, a damping element canbe secured about the spindle rail to damp noise.

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PATENTEDSEPI mm 3.604; 191

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INVENTOR. RUDOL F JAEGGLJ PATENTEB SEP'I 419m 3,604,191

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26 /23 IE v j M i 1 iiixiw 1 1 I W. a 19 I a \m INVENTOF RUDOLF JHEGGLTWISTING MACHINE This invention relates to twisting machines and moreparticularly to twisting machines on which a thread is wound or unwoundfrom a bobbin.

, Heretofore, various twisting machines have been in use for imparting atwist into a thread. However, these machines have had the disadvantageof emitting a large degree of noise due to vibration during operation.For example, in some instances, spindle rails on which a number ofrotatable spindles are mounted have been rigidly mounted on the machineframe. In this arrangement, the spindles have produced vibrations whichhave been transmitted to the machine frame and have been partiallyemitted as noise by the whole vibrating system formed by the spindlerail and the remainder of the machine. In addition to the undesireablenoise generation, this arrangement also has presented the considerabledisadvantage that all the elements not mounted rigidly to the machineframe have been excited at the vibration frequency and constantly bumponto the frame to cause a disturbing noise. In other machines,

two spindle rails have been mutually connected by connecting T guides ofthe machine frame in the horizontal direction so that the vibrations ofthe spindle rails, as far as they have not been vertical, have beentransmitted to the machine frame. F urthermore, isolation of the machineframe from the floor to which it has been fastened by the use ofvibration-dampening means has been known. In this latter arrangement,while the transmission of vibrations to the floor has been reduced, the

machine itself still has vibrated and has emitted these vibrations asnoise in the audible spectrum.

Also, it has been known to dampen the connection between intensity ofthe vibrations transmitted to the spindle rail; however, insufficientlydampened vibrations'have still been transmitted to the spindle rails andfrom there to the machine,

frame which presents large noise emission surfaces.

Accordingly, it is an object of the invention to reduce machinevibrations in order to avoid mechanical damage.

It is another object of the invention to reduce noise emission bytwisting machines.

It is another object of the invention to reduce the number of noiseemitting vibrating surfaces in the twisting machines.

It is another object of the invention to isolate the neighborhood of aspindle rail from vibration noise.

It is another object of the invention to suppress rocking or torsionmovements around the length axis of a spindle rail caused by the forcesexerted by the spindles without using rigid connections.

Briefly, the invention provides a twisting machine having a machineframe with longitudinally extending stationary spindle rails to eachside of the frame, each of which supports a plurality of spindles. Inaddition, the spindle rails are con-.

nected together with a plurality of rigid connecting cross members toform a rigid frame and the'resulting rigid frame is connected to themachine frame by means of omnidirectionally acting dampening members.These dampening members, such as resilient blocks, are preferablymounted between the spindle rail frame and the machine frame at thegreatest distance possible from the central axis of the machine frame.

In other embodiments, the spindle rails are surrounded by a noiseabating cover in order to further reduce the noise generated by themachine. For example, in one embodiment, the noise-abating cover isconnected by means of a rigid connecting piece to the machine frame andencloses at least a part of the drive elements for the spindles whichmay also vibrate with the spindles. In another embodiment, thenoise-abating cover is connected by means of a dampening member to themachine frame. In still another embodiment, the noise-abating cover isconnected directly to the spindle rails by means of a dampening member.

These and other objects and advantages of the invention will become moreapparent from the following. detailed description and appended claimstaken in conjunction with the accompanying drawings in which:

FIG. 1 illustrates a crosssectional view of a twisting machine accordingto the invention;

FIG. 2 illustrates a view taken on line llIl of FIG. 1;

FIG. 3 illustrates a view taken on line III--Ill of FIG. 1 of acrossmember;

FIG. 4 illustrates a side view of a modified twisting machine accordingto the invention;

FIG. 5 illustrates a view taken on line V-V of FIG. 4; and

FIG. 6 illustrates a cross-sectional view of a modified noiseabatingcover about a spindle rail according to the invention.

Referring to FIG. 1, the twisting machine has a rigid frame 6 which issecured as by bolts to a floor and which is constructed of a pluralityof spaced upstanding supports 4 connected together by longitudinallyextending elements 5. In addition, a spindle rail 2, 3 is disposed oneach side of the machine frame 6 and supports a plurality oflongitudinally disposed spindles l thereon, as is known, for example, bya rigid or flexible mounting. The spindles 1 in turn carry rotatablebobbins 7 thereon for winding and unwinding of thread thereon as isknown. The

uniform intervals by rigid crossmembers 8 to form a rigid ladderlikeframe in order to suppress the forces generated by the i315 the spindlesand the spindle rails to achieve a reduction of the.

rotating bobbins 7 which forces cause strong vibrations includinglongitudinal and torsional vibrations.

In order torotate the spindles l, a spindle drive of known constructionis mounted on the frame 6 and includes a tape 9 which passes around thespindles l to impart a rotating force thereto. The momentum which actson the spindle rails 2, 3 due to the forces generated by the tape 9 arealso taken up by the ladderlike frame of spindle rails 2, 3 andcrossmembers 8.

Referring to FIGS. 1 and 2, the ladderlike frame of spindle rails 2, 3and crossmembers 8 is mounted on the machine frame 6 byomnidirectionally acting dampening members 11, for example, resilientblocks made up of layers of rubber pads 10. Each dampening member 11includes an upper metal plate 12 and a lower metal plate 13 which arevulcanized to the rubber pads 10 sandwiched therebetween and which serveto secure the members 11 to the spindle rails and machine frame supports4. As shown, the upper metal plate 12 is secured as by screws to aspindle rail 2 while the lower metal plate 13 is secured as by screws toa support 4.

Referring to FIG. 2, if sufficiently rigid, the upper metal plate 12 canbe used as a connecting piece to connect two adjacent sections 14, 15 ofa spindle rail together at a junction point 16 with suitable screws. Inthis case, the dampening member 11 is positioned so that the junctionpoint 16 is disposed in the middle plane of the dampening member 11 (asindicated in dash-dot lines).

Referring to FIG. 1, the spindles 2, 3 are positioned so that thedistance between the spindle rails 2, 3 corresponds to about the widthof the machine frame 6 with the result that a desirably large distanceis achieved between opposite supporting points of the ladderlike frameon the resilient blocks 11 about the vertical plane defined by thecentral longitudinal axis of the machine frame. Consequently,notwithstanding the elasticity of the silent blocks 11, the horizontalposition of the ladderlike frame is sufficiently maintained even underthe influence of the momentums originating from the spindles 4.

The dampening members 11 are sized to be, for example, 5 cm. by 8 cm.with a 4 cm. thickness or height, and have a Shore hardness of, forexample, 45 degrees. The spindle rails 2, 3 are of rectangular crosssection so as to present an ideal spindle rail design in which a mass aslarge as possible presents an emitting surface as small as possible, andin which a sufficiently high momentum of resistance is reached so thatthe amplitudes of the vibrations caused by the spindle forces can bekept as small as possible. The cross section of the crossmembers 8 canalso be chosen in a similar manner. For example, as shown in FIG. 3, acrossmember can be formed with a circular cross section in the zonebetween the spindle rails.

This is advantageous insofar as a circular cross section of thecrossmember results in a minimum noise emission.

Referring to FIGS. 4 and 5, instead of supporting the spindle rails 24directly by means of resilient block dampening member 19, as shown inFIG. 1, the crossmembers 18 of the ladderlike frame are mounted as byscrews via the silent blocks 19, 20 directly onto longitudinal members21, 22 which form part of a machine frame 23. The dimensions to bechosen of the silent blocks 19, 20 arranged between spindle rails 24 andmachine frame 23 largely depend on the conditions between the diaphragms25 of the draw-twisting machine shown as an example.

Referring to FIG. 4, with six spindles 26 mounted on each section ofspindle rail 24, the weight of the elements supported (i.c. theladderlike frame including the weight of spindles 26 and bobbins)amounts to 80 kg. per dampening member 19. Further, for a dampeningmember 19 of dimensions of 5 cm. by 8 cm. by 4 cm. and a Shore hardnessof 45 degrees, as above, measurements which have been carried out haveshown that the vibration forces acting on the machine frame at a spindlespeed of approximately 10,000 rpm. are reduced to about 2 percent of theforces which would act if the spindle rails were otherwise rigidlyconnected to the machine frame.

Further, where the spindles are driven by a tangential belt 29 pressedagainst the spindle whorls 27 by tension rolls 28, the drive elementseither vibrate clue to direct influence of the spindles 26 or of thevibrating spindle rails 24, or cause vibrations themselves and thus emitnoise. In order to isolate this noise source from the surrounding room anoise-abating cover 30 is connected by means of a support member 32which can be designed as a rigid member or as a dampening member (FIG.5) with the machine frame 23, which practically no longer vibrates, andis arranged around a spindle rail 24 and along at least the length ofthe belt 29. The inside of the cover 30 can be provided with anoise-abating or antivibration lining 31 in order to damp out the noisetherein.

Referring finally to FIG. 6, noise emission by a spindle rail can befurther reduced by attaching a cover 33 formed of two parts which arescrewed together directly to the spindle rail 35 via a dampening element34. The dampening element 34 which can be a dampening substance, such aspolyurethane foam, is cast into the cover 33 to fill the space betweenthe spindle rails 35 and cover 33 in order to avoid the formation of anecho chamber within the cover 33. Experiments have shown a reduction ofabout 6 decibels of the noise emission level with the use of this cover33 and dampening element 34.

It is noted that the invention relates to any twisting machine fortextile threads and includes all machines on which a thread is taken upby, or taken off from, a bobbin placed on a spindle and twist isimparted. In particular, the twisting machines included arering-twisting, draw-twisting, ring-spinning, as well as uptwistingmachines and twisters arranged in tiers, all containing spindlesarranged on a spindle rail mounted along the machine.

What is claimed is:

1. In combination with a twisting machine having a machine frame, arigid frame including longitudinally extending stationary spindle railsto each side of said machine frame for supporting a plurality ofspindles and a plurality of crossmembers rigidly connected to and acrosssaid spindle rails, and a plurality of omnidirectionally actingdampening members supporting said rigid frame on said machine frame.

2. The combination as set forth in claim 1 wherein said dam peningmembers are each mounted on said machine frame at the greatest distancepossible from the central longitudinal axis of said machine frame.

3. The combination as set forth in claim 1 wherein said dampeningmembers are mounted directly below said spindle rails.

4. The combination as set forth in claim 1 wherein said dampeningmembers are disposed between said crossmembers and said machine frame.

5. The combination as set forth in claim 1 wherein said dampeningmembers are disposed between said spindle rails and said machine frame.

6. The combination as set forth in claim 1 wherein each said crossmemberhas a circular cross section over a substantial length thereof.

7. The combination as set forth in claim 1 wherein said dampeningmembers are resilient blocks.

8. The combination as set forth in claim 1 which further includes atleast one noise-abating cover about each said spindle rail.

9. The combination as set forth in claim 8 which further includes arigid connecting piece rigidly securing said cover to said machineframe.

10. The combination as set forth in claim 8 which further includes adampening element securing said cover to said spindle rail.

11. The combination as set forth in claim 10 wherein said dampeningelement fills the space between said cover and said spindle rail.

12. The combination as set forth in claim 10 wherein said dampeningelement is a noise-abating substance cast between said cover and saidspindle rail.

13. The combination as set forth in claim 8 which further includes adampening member connecting said cover to said machine frame.

14. The combination as set forth in claim 8 which further includes adrive having drive elements including a tangential belt pressed againstsaid spindles for driving the spindles on said spindle rails, whereinsaid cover encloses at least part of said tangential belt.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3,6O-l,l9l Dated September 14 1971 Inventor (s) Rudolf Jaeggli It iscertified that error appears in the above-identified patent and thatsaid Letters Patent are hereby corrected as shown below:

Column 3, lines 6 and 9, change "silient" to --resilient-- Signed andsealed this 11 th day of April 1972.

(SEAL) Attest:

EDWARD M. FLETCHER JR ROBERT GOTTSCHALK Attesting Officer Commissionerof Patents RM PO-IOSO [10-69)

1. In combination with a twisting machine having a machine frame, arigid frame including longitudinally extending stationary spindle railsto each side of said machine frame for supporting a plurality ofspindles and a plurality of crossmembers rigidly connected to and acrosssaid spindle rails, and a plurality of omnidirectionally actingdampening members supporting said rigid frame on said machine frame. 2.The combination as set forth in claim 1 wherein said dampening membersare each mounted on said machine frame at the greatest distance possiblefrom the central longitudinal axis of said machine frame.
 3. Thecombination as set forth in claim 1 wherein said dampening members aremounted directly below said spindle rails.
 4. The combination as setforth in claim 1 wherein said dampening members are disposed betweensaid crossmembers and said machine frame.
 5. The combination as setforth in claim 1 wherein said dampening members are disposed betweensaid spindle rails and said machine frame.
 6. The combination as setforth in claim 1 wherein each said crossmember has a circular crosssection over a substantial length thereof.
 7. The combination as setforth in claim 1 wherein said dampening members are resilient blocks. 8.The combination as set forth in claim 1 which further includes at leastone noise-abating cover about each said spindle rail.
 9. The combinationas set forth in claim 8 which further includes a rigid connecting piecerigidly securing said cover to said machine frame.
 10. The combinationas set forth in claim 8 which further includes a dampening elementsecuring said cover to said spindle rail.
 11. The combination as setforth in claim 10 wherein said dampening element fills the space betweensaid cover and said spindle rail.
 12. The combination as set forth inclaim 10 wherein said dampening element is a noise-abating substancecast between said cover and said spindle rail.
 13. The combination asset forth in claim 8 which further includes a dampening memberconnecting said cover to said machine frame.
 14. The combination as setforth in claim 8 which further includes a drive having drive elementsincluding a tangential belt pressed against said spindles for drivingthe spindles on said spindle rails, wherein said cover encloses at leastpart of said tangential belt.